#include <iostream>

using namespace std;


class A{
public:
    A(){
        cout << "I am A" << endl;
    }
};

class B{
public:
    B(){
        cout << "I am B" << endl;
    }
};

class C{
public:
    C(){
        cout << "I am C" << endl;
    }
};

class D{
public:
    A a;
    C c;
    B b;
    char* p;
};



int main(){
    D d;
}